import java.io.*;
import java.util.*;
public class Example10_16 {
    public static void main(String args[]) {
        File file = new File("student.txt");
        Scanner sc=null;
        int count=0;
        double sum=0;
        try { double score=0;
             sc = new Scanner(file);
             sc.useDelimiter("[^0123456789.]+"); 
             while(sc.hasNextDouble()){
                 score=sc.nextDouble();
                 count++;
                 sum=sum+score;
                 System.out.println(score); 
             }
             double aver=sum/count;
             System.out.println("平均成绩:"+aver);
        }
        catch(Exception exp){
            System.out.println(exp); 
        }
    }
}
